Filled-sack-sewing machine.



Patented Oct. 22,|9o|. A. T. TIMEWELL.

FILLED SACK SEWING MACHINE.

(Application filed Oct. 8, 1898.) (No Model.) 2 Sheets-Sheet l.

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No. 684,959. Patented Oct. .22, I90l. A. T.- TIMEWELL.

FILLED SACK SEWING MACHINE.

(Applicatiqqflled. Oct 8, 1898.) (No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFI E.

ARTHUR THOMAS TIMEWELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALBERTDICKINSON, OF CHICAGO, ILLINOIS.

FILLED-SACK-SEWING MACHINE.

SPEGIFI'JATION forming part of Letters Patent No. 684,959, dated October22, 1901.

Application filed October 3,1898. Serial No. 692,475. (No model.)

T0 all whom it may concern:

Be it known that I, ARTHUR THOMAS TIME- WELL, a citizen of the UnitedStates, residing in Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement inFilled-Sack-Sewing Machines, of which the following is a specification.

My invention relates to filled-sack-sewing machines, and moreparticularly to improvements upon the filled-sack-sewing machineheretofore patented to me in Letters Patent of the United States No.607,809, dated July 19, 1898. In the machine of my said former patentthe mouth edges of the filled sacks are conveyed past the sewingmechanism by a pair of endless flexible sack-holding clamps or chains,the chains being driven continuously and conveying the sack by acontinuous movement past the sewing mechanism.

The object of my present improvement is to perfect the operation of themachine of my said former patent; and the present improvement consistsin providing said machine with means for facilitating the feeding orentering of the mouth edges of the sack into the bight of the continuousflexible sack-holding clamps or chains, said means consisting,preferably, in a pair of toothed or roughened sack-feed wheels mountedsomewhat in advance of the sprocket-wheels around which theconveyorchains pass, so that the sack-feed wheels will tend to feed orforce the fabric of thesack into the bight of the sack-holder chains.

It also consists, in connection with the sackholder chains and saidfeed-wheels, in mechanism for driving said feed-wheels at a faster speedthan the sack-holder chains, preferably about double the speed of thesack-holder chains, so that the sack-feed wheels will also serve togather the mouth edges of the sack preparatory to their being fed intothe sackholder chains and sewed, thus materially shortening thenecessary length of the seam and greatly strengthening the mouth of thesewed sack at the seam and also improving the appearance of the sewedfilled sack.

My invention further consists in providing the endless flexiblesack-holder clamps or chains with a rapidly intermittent drivingmechanism, so that said sack-holding chains may be stationary orsubstantially stationary at the intervals when the needle is in thesack, the forward movementof the sack taking place or chiefly takingplace under the action of the chains when the needle is out of thefabric. As in my filled-sack-sewing machine the needle ordinarily makesaboutfifteen hundred stitches per minute, it will be understood thatthis gives a corresponding number of starts and stops to thesack-holding chains per minute. By this means the operation of themachine is materially improved, the needle is freed from all lateralstrain, and the durability of the sewing mechanism increased.

Any suitable mechanism for driving or propelling the sack-holding chainsforward by a rapid succession ofimpulses may be em ployed in combinationwith the other parts in practicing this feature of the invention; but Iprefor to employ for this purpose a rapidly-revolving two-toothed gearengaging a toothed wheel, through which motion is communicated to thesack-holding chains.

In the accompanying drawings, forming a part of this specification,Figure 'l is a plan View of a machine embodying my invention. Fig. 2 isa detail front elevation. Fig. 3 is a detail side elevation of thepreferred form of mechanism for imparting to the sack-holding chains thenecessary rapid intermittent forward movement, and Figs. 4 and 5 areside elevations showing the sack before being sewed and after.

In the drawings, A represents the frame or bed-plate of the machine, thesame being provided with a longitudinal slot 0. for the mouth edges ofthe sacks to project through as they are being conveyed past the sewingInechanism. The slot or is spanned by bridges A A. The frame orbed-plate A is also provided with guides O O to guide the endlessflexible sack-holder clamps D D, the same consisting, preferably, of twoendless chains traveling on suitable sprocket-wheels d d.

F F are the sack-feed wheels, the bight of the Wheels F F being'inadvance of the bight of the chains D D, so that the feed-Wheels F F willserve to force the edges of the sackmouth into the bight of the sack-holding chains or flexible clamps D D, as will be read ily understoodfrom Fig. 1 of the drawings. The feed-wheel F is mounted on a pivoted orswinging arm F and is pressed against its fellow with the requisitetension or pressure by a spring F The feed-wheel F is an idler; but thefeed-wheel F is driven and preferably at a greater surface speed thanthat of the sack-holding chains or clamps D D, so that the feed-wheels FF operate also as a gathering mechanism to gather the mouth edges of thesack, as illustrated in Fig. 5, and thus shorten the necessary length ofthe seam. The feed-wheel F is secured rigidly to a shaft f, which isprovided with a bevelgear f, meshing with bevel-gearf on shaft f throughwhich motion is communicated to the feed'wheels F F. One of the loose oridler sprocket-wheels d for one of the endless flexible clamps or chainsD is journaled upon the shaftfof the feed-wheel F and is preferably madeof approximately the same diam eter as the feed-wheel F, though somewhatsmaller, in order that the bight of the feed-' wheels F F upon the mouthof the sack may be only slightlyin advance of the bight of thesack-holder chains D D upon the sack.

The sewing mechanism 13 may be of any suitable construction known tothose skilled in the art and needs no special description. I prefer toemploy, however, the construction of sewing mechanism illustrated anddescribed in my said former patent.

G is the driving-pulley, and Gr the drivingshaft, from which motion iscommunicated to the different parts of the machine. Motion iscommunicated to the sewing mechanism B from the driving-shaft G throughthe bevelgears g g. The driving-shaft G is furnished with a two-toothedgear 7 which meshes with a long-toothed gear g and thus communinicates arapidly intermittent rotation to said long-toothed gear, as will bereadily understood from Fig. 3 of the drawings. The longtoothed gear gis fixed to-a shaft g which is provided with a bevel-gear 9 throughwhich motion is communicated to the bevel-gear g on the shaft 9 by whichthe sack-holding chains D D are driven through the bevelgears g 9meshing with the bevel-gears g g on the shafts g, which carry the drivensprocket-wheels d d for each chain D. The shaft f is provided with abevel-gear f that meshes with the bevel-gear g so that the shaft f andthe feed-wheels F F thus have a corresponding intermittent movement tothe chains D D. The shaftsf and g run at the same speed, and thefeed-wheel F is caused to travel at the required greater surface speedthan the chains D D by reason of the gear f on said shaft f being oflarger size than the gears g on the shaft '9 which communicate motion tothe driven sprocketwheels (Z (Z of the chains D D, and the gears g onthe shafts of said driven sprocketwheels g are also of larger size thanthe gear f on the shaftfof the driven feed-wheel F. By varying therelative sizes of these gears any required or desired difference ofspeed may be given to the feed-wheels F F in respect to that of thesack-holder chains D D.

I claim- 1. In a filled-sack-sewing machine, the combination with asewing mechanism, of flexible endless traveling sack-holder clamps and apair of sack-feed wheels in advance thereof to force or feed the edgesof the sack-mouth into the bight of the flexible sack-holder clamps,substantially as specified.

2. In a filled-sack-sewing machine, the con bination with a sewingmechanism, of flexible endless traveling saclcholder clamps, a pair ofsack-feed wheels in advance thereof to force or feed the edges of thesack-mouth into the bight of the flexible sackholder clamps, andmechanism for driving said feed-wheels at a faster surface speed thanthe sack-holder clamps to produce gathers in the edges of the sack-mouthbefore itenters the clamps, substantially as specified.

3. In a filled-sack-sewing machine, the combination of a sewingmechanism with a pair of endless flexible travelingholder-clamps, a pairof guides therefor to cause them to clamp and hold the sack-mouthbetween them, and mechanism for imparting a rapidlyintermittent forwardmovement to said endless flexible sack-holder clamps, the forwardstep-bystep movement of said sack-holder clamps taking place at theintervals when the needle of the sewing mechanism is withdrawn from thesack, substantially as specified.

4:. In a filled-sack-sewing machine, the combination with a sewingmechanism, of an endless flexible traveling sack-holder clamp,

and means for producing gathers in the edges of the sack-mouth, saidmeans comprising a pair of wheels rotating at afaster speed than thesack-holder clamp travels, substantially as specified.

5. The combination in a filled-sack-sewing machine, with a sewingmechanism, of apair of endless, flexible traveling, sack holder clamps,having'each a recurrent travel in an endless path, a pair of guidestherefor to cause them to clamp and hold the sack-mouth between them,and mechanism comprising a two-toothed gear and a long-toothed gear forimparting a rapidly intermittent forward movement to said sack-holderclamps, substantially as specified.

ARTHUR THOMAS TIMENVELL.

Witnesses:

FRED. G. LUNNON, II. D. JAMEsoN.

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